Improvement in bung-bush wrenches



'DQAGKERMAN.

Bung-Bush Wrench.

Patented Aug. 5,1879.

Invenibr:

N. PETERS, FHOTQ-LIYHDGRAPNEK WASHINGTON. D C,

UNITED STATES PATENT OFFICE.

DAVID AOKERMAN, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN BUNG-BUSH WRENCHES.

Specification forming part of Letters Patent No. 218,106, dated August5, 1879; application filed December 1'2, 1878.

To all whom it may concern:

Be it known that I, DAVID AOKERMAN, of the city of Chicago, Cook county,State of Illinois, have invented a new and useful Improvement inWrenches for Inserting Bun g-Bushes, of which the following is a fulldescription, reference being had to the accompanying drawings, in whichFigure 1 is a side elevation showing the wrench in position forinsertion, a portion of the head being in section to show the upperhearing or connection of the loose or movable section of the wrench;Fig. 3, a side elevation of the head and stationary section; Fig. 2, abottom view of the complete wrench; Fig. 4, a bottom view with themovable section removed.

This invention relates to that class of wrenches designed for theinsertion of hollow screw-plugs or metal facings into openings, and isprimarily designed to be used with bung-bushings.

Its objects are to simplify the construction, lessen the cost ofmanufacture, and improve the construction of that portion of the wrenchwhich is inserted in the opening in the bushing, so that in theoperation of inserting the bushing the strain will be distributed aroundthe'entire circumference of the bush instead of being located at asingle point; and its nature consists in providing a head with a supportadapted to enter the opening in the bush,

. consisting of a stationary section and a movable section, each sectionconsisting of a halfcircle, except that a small portion of the cornerface of the stationary section is cut away to form a fulcrum to engagewith the movable or loose section and force it against the face of thebush-opening, and in the devices for securing the movable or loosesection in place.

In the drawings, A represents the head; B, the fixed or stationarysection or half-circle of the support; 0, the movable or loose sectionor half-circle of the support; D, the strap supporting the lower end ofthe loose section G; E, the opening in the head for the insertion of abar or lever F, the bar or lever; a, the opening or bearing for theupper end of the movable section; b, the pin on the upper end of themovable section; 0 c, the screws for attaching the plate or strap D; d,the cutaway portion of the stationary section; 0, the fulcrum; f, theserrations or teeth on the movable or loose section.

The head A may be cast or otherwise suitably formed, and may be of anydesired shape, and, as shown, is provided with a hole, E, in which a baror lever, F, is inserted for operatin g the wrench.

The half-circle or section B of the bush-support is cast or formed withthe head, as shown, and is slightly tapered, and has a smooth outersurface. The inner surface or face of this section has a small portion,d, cut away at one corner, so as to leave a fulcrum, e, as shown in Fig.4.

The loose section or half-circle G is cast or otherwise suitably formed,its outer surface, as shown, being provided with teeth or serrations fto engage with the face of the bushopening, and its inner face beingleft flat and plain, and the outer face being given a slight taper. Thissection 0 lies loosely against the inner face of the section B, and, asshown, is held in place by the pin or projection b on the upper end ofthe section, which enters an opening, a, in the under face of the headA, suitably located and formed to receive the pin and form a bearin gtherefor, and the strap D, one end 'of which is secured to the underface of the section B, and the other to the under face of the section 0,by means of screws 0 c, or in any other suitable manner.

The diameter of the opening a is larger than the diameter of the pin 1),and the opening in the end of the strap which is secured to the section0 for the passage of the screw 0 has a larger diameter than the screw,by which means the section 0 has considerable freedom of movement toinsure its proper working.

The form of the taper and the circumference of the two sections whentogether are such as to permit the proper insertion of the wrench in theopening of the bushing.

In Figs. 1 and 2 the parts are shown in the position they occupy whenready for insertion, and, when inserted, by turning the head in thedirection for inserting the bush to a slight extent, the stationarysection B, by reason of its smooth outer face, will slip or slide on theface of the hush-opening, while the movable section (3, by reason of theteeth or serrations on its outer face, will engage with the face of thebushopening, causing the fulcrum e on the section or half B to engagethe face of the section or half 0 at a given point, and press or carrysaid section outward against the face of the bushing or opening, therebyengaging the wrench with the bushing, which engagement will continueuntil the bush is inserted, when a slight reverse movement can be givento the head A, which disengages the fulcrum e from its contact with theface of the loose section, allowing the section to fall back to itsfirstposition, when the wrench can be withdrawn.

A pin or projection might be formed on the lower end of the section 0,and take the place of the screw 0 for attaching the section to the strapD; and other means than the strap D can be used for supporting the loosesection at its lower end.

By making the support for the bushing of two sections or half-circles,one stationary and the other loose, and providing the stationary sectionwith a fulcrum, so that it will act as a lever to press or carry theloose section outward, it will be seen that the pressure on the bushwill be pretty evenly distributed around its entire circumference, andthereby the insertion of the bush rendered more uniform, with lessdanger of breakage.

By using only two sections or half-circles, constructed and operating asdescribed, a wrench is provided which does away with eccentrics,rollers, or other devices heretofore used for expanding outside pieces,arranged around a central core, in wrenches of this class, whichdevices, in practice, are found largely impracticable, by reason of thebreakage of the outside pieces by the action of the eccentrics orrollers, and the forcing of the bushes out of shape and breaking themwhen inserting them in place from the undue strain in one place exertedby the actionof these devices.

In the form shown the wrench is adapted for inserting bushes only; but,by cutting away the opposite corner of the section B, as shown by dottedlines in Fig. 2, it can he used for inserting and removing.

What I claim as new, and desire to secure by Letters Patent, is-

A, bung-bushing wrench having the head A and the section B formedtogether, in combination with an expansible section formed with an arcof the same circle, and the expanding shoulder c, substantially asspecified.

DAVID ACKE RM AN.

Witnesses:

O. W. Bonn, J. C. PoLLEY, Jr.

